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Science and Technology Tasks Week 8

BBC Schools: Cats' Eyes: Plants and Animals - Flowers, Seeds and Plants

Look at different seeds or pictures of different seeds. Take a look closer at the inside of flowers, plants and fruit. Together, sort the different organic things into fruits, seeds and flowers. What is important about these kernels, seeds, pips which are found inside fruits? What is their job?
Use the story'Bees Like Flowers' by Rebecca Bielawski to help your discussion.


Bees Like Flowers

Talk about the importance of pollen being dispersed by the bees and insects. Ask: Can you think of different ways that a plant could get its seeds dispersed? (Through animals eating them, by sticking to animals, by being blown by the wind, or floated off by water or by bursting open or gravity.)Encourage them to look at the shape of the seeds for clues as to how they are dispersed.
Why is it very important for plants to have seeds that can travel? Why is it better for them to be dispersed than to just drop on the ground in a heap all together? (The seeds will avoid overcrowding and competing with each other.) Think about seeds dispersed by wind. Talk about the little feathery bits on the dandelion seed and also the flat structure of the maple seed.
Ask: How do their designs help them to float in the wind? You are going to make a flat seed (a paper helicopter) to test outside and also will make a model of a dandelion seed.

BBC Bitesize - Seeds and Seed Dispersal

Discover the many wonderful ways in which flowering plants spread their seeds and why they're found from the waterside to the hilltops, and everywhere in between.

Make a clay/playdough model of a seed designed to attach to animals' fur - a burr with hooks or even make a junk model seed. Discuss together what sort of dispersal their model seed will be designed for. When you have come to a collective decision, think of different design features your model seed could have. For example, if you choose 'Blowing' then your seed will need flat or feathery parts and will need to be lightweight. Encourage children to write any ideas and facts about your  choice of seed dispersal on the large sheet of paper so you can display them with your junk model seed when you have finished it and you can send us a picture or a JIT Mix so we can see it!